In the article “Sleep Deprivation Effects on Circadian Clock Gene Expression in the Cerebral Cortex Parallel Electroencephalographic Differences among Mouse Strains” by Jonathan P. Wisor, Ravi K. Pasumarthi, Dmitry Gerashchenko, Carol L. Thompson, Sayan Pathak, Aziz Sancar, Paul Franken, Ed S. Lein, and Thomas S. Kilduff, which appeared on pages 7193–7201 of the July 9, 2008 issue, Figure 3 should have appeared as a color figure. The correct Figure 3 is printed here.